About the Polk Audio db521
Give your music new life
Stylish, durable ABS grilles
Give your music new life
Good music becomes great when you hear it through Polk's db Series car speakers. Polk engineers use laser imaging to determine the ideal combination of speaker materials and design to eliminate distortion. The resulting technology produces speakers with smooth frequency response, sharp detail, and the ability to play music at high volumes without strain.
Durable and dynamic
Polk's db521 speakers feature 5-1/4" woofers made from a polymer/mica composite and durable rubber surrounds that won't fall apart under stress from heat, moisture, or time. Liquid-cooled 3/4" silk/polymer dome tweeters use powerful Neodymium magnets to deliver precise high-frequency reproduction, enveloping you in bright musical detail. And you can even pivot the tweeters, aiming them at your ears for improved stereo imaging. The built-in two-way crossovers keep the high and low frequencies flowing to the proper drivers for seamless, efficient audio.
The stainless steel mounting hardware is built to last, while the muscular ABS grilles will look great in your car's interior. Whether you've got a factory radio or an aftermarket stereo, these efficient speakers will spice up your daily drive.
Priced per pair
- 5-1/4" 2-way cars speakers (pair)
- marine certified — recommended for fresh water and powersports applications
- Dynamic Balance polymer/mica composite woofer with butyl rubber surround
- 3/4" pivoting liquid-cooled silk/polymer composite dome tweeter
- Neodymium tweeter magnet
- Kapton voice coil
- built-in 2-way crossover network
- ABS wheel-design grilles
- stainless steel mounting hardware
- power range: 4-45 watts RMS (135 watts peak power)
- frequency response: 60-22,000 Hz
- sensitivity: 93 dB
- top-mount depth: 2-5/16"
- warranty: 1 year
- Our 60-day money-back guarantee
- MFR # AA1521-A
What's in the box:
- Two 2-way speakers
- 2 Grilles
- 8 Self-tapping screws (length=1")
- 8 Speed clips
- Owner's Manual (English/ Spanish/ French/ German/ Italian/ Portuguese)
- Online registration sheet
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More details on the Polk Audio db521
Features & specs
|Speaker Size||5 1/4|
|Tweeter Design||3/4" Dome|
|Tweeter Composition||Silk/Polymer composite|
|Woofer Composition||Polymer/Mica composite|
|Woofer Surround||Butyl rubber|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
|Sensitivity (1W at 1 meter)||93|
|Sensitivity at 2.83 volts||N/A|
|Frequency Response||60 - 22k Hz|
|Minimum RMS Wattage||4|
|Maximum RMS Wattage||45|
|Peak Power Handling (Watts)||135|
|Top-mount Depth (Inches)||2 5/16|
|Bottom-mount Depth (Inches)||N/A|
|Cutout Diameter or Length (inches)||4 3/4|
|Mounting Height (Inches)||0.8125|
Dynamic Balance: Dynamic Balance is a proprietary Polk Audio technology using laser imaging to determine what combination of speaker materials create the least amount of resonance. Eliminating resonance in speakers results in a wide, smooth response and low distortion.
Woofer Cones: Each speaker features a Dynamic Balance polymer/mica composite mineral-filled cone. The cones are stiff and lightweight for big sound and low distortion.
Butyl Rubber Surrounds: For a smoother response and improved durability, the woofers use butyl rubber surrounds.
Kapton Voice Coil Former: The low-mass two-layer 25mm Kapton Voice Coil former is lightweight for high sound output. Kapton's high melting temperature (725°F) ensures high power handling and longer reliability.
Silk/Polymer Composite Tweeters: The 3/4" liquid-cooled, silk/polymer composite tweeters provide clear, detailed highs. The tweeters use neodymium magnets.
Pivoting Tweeter: The tweeter pivots, allowing you to aim it toward your listening position for better imaging.
2-way Crossover Network: The built-in 2-way crossover network sends the appropriate frequencies to each driver for cleaner sound and better imaging.
Flat Spider: The speaker utilizes a flat spider for faster, longer excursion linear motion.
Pole Plate Heat Sink: The speaker's pole plate heat sink promotes better heat dissipation for superior power handling and reliability.
Woven Leads: The speaker features flexible woven leads sewn directly into the spider for greater reliability.
Basket: The speaker is housed in a solid, acoustically inert stamped steel basket finished in rustproof gun metal gray.
Grilles: Strong ABS plastic grilles are included. These computer optimized grilles are based on exclusive MOMO designs.
Marine Certification: Polk speakers are marine certified, making them a good choice for boats in fresh water, convertibles, motorcycles, ATVs, and other applications where the speaker might get wet. Because they have coated steel baskets and the terminals and crossover components are not covered, we do not recommend using them in salt water environments.
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